Hello,
I want to confirm the internal level diagram.
There are roughly blocks which interpolation, IQ mixer, SINC filter and DAC. When Input digital signal is assumed x [dB], I would like to know the output level of each block.
1. Interpolation output
Frequency response is in figure 58 to 65. The gain is typically 0dB so output power would be x [dB].
2. Mixer output
When Mixer Gain = 0, summed IQ power is 3dB loss. In this case, the output power is (x-3) [dB]
When Mixer Gain = 1, summed IQ power is 0dB. In this case, the output power is x [dB].
3. inverse SINC filter
Figure 67 is the frequency response. Roughly gain is 0dB if the RF frequency is below 0.4 x fDAC. so the output power is x[dB], mixer gain =1 case.
4. DAC
when default, DAC gain is disable case, DAC will ouptut the power as same as the digital signal so the output power would be x [dB], mixer gain = 1 case.
Please correct me if my understanding is incorrect.
Best regards,
Toshihiro Watanabe
